Raspberry Pi Compute Module 4

1 Colophon 2021 Raspberry Pi (Trading) documentation around the Raspberry Pi Compute Module 4 is licensed under a Creative Commons Attribution-NoDerivatives International (CC BY-ND).build-date: 2021-10-12build-version: githash: 44673b6-cleanLegal Disclaimer NoticeTECHNICAL AND RELIABILITY DATA FOR Raspberry PI PRODUCTS (INCLUDING DATASHEETS) AS MODIFIED FROMTIME TO TIME ( RESOURCES ) ARE PROVIDED BY Raspberry PI (TRADING) LTD ( RPTL) "AS IS" AND ANY EXPRESS ORIMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY ANDFITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

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4 RPTL specifically disclaims any express or impliedwarranty of fitness for High Risk Activities and accepts no liability for use or inclusions of Raspberry Pi products in HighRisk Pi products are provided subject to RPTL s Standard Terms. RPTL s provision of the RESOURCES does notexpand or otherwise modify RPTL s Standard Terms including but not limited to the disclaimers and warranties expressedin Pi Compute Module 4 Legal Disclaimer Notice1 Table of ContentsColophon.. 1 Legal Disclaimer Notice.. 11. Introduction.. Introduction.. Features.. 32. Interfaces.. Wireless.. WL_nDisable.

5 BT_nDisable.. Ethernet.. PCIe (Gen2 x1).. USB (Highspeed).. GPIO.. Alternative Function Assignments.. Dual HDMI .. CSI-2 (MIPI Serial Camera).. DSI (MIPI Serial Display).. I2C (SDA0 SCL0).. I2C (ID_SD ID_SC).. SDIO/eMMC (CM4 Lite only).. Analog IP0/IP1.. Global_EN.. RUN_PG.. nRPI_BOOT.. LED_nACT.. LED_nPWR.. EEPROM_nWP.. 133. Electrical and Mechanical.. Mechanical.. Thermal.. Electrical Specification.. 154. Pin Out.. Differential Pairs.. 100 Differential pairs signal lengths.. 90 Differential pair signal lengths.. 255. Power.. Power up sequencing.

6 Power down sequencing.. Power Consumption.. Regulator Outputs.. 27 Appendix A: Troubleshooting.. 28 Hardware Checklist.. 28 Bootloader.. 28rpi-eeprom-update.. 28 EEPROM Write protect.. 28 Firmware.. 29 Kernel.. 29 Appendix B: Availability.. 30 Support.. 30 Ordering codes.. 30 Packaging.. 31 Raspberry Pi Compute Module 4 Table of Contents2 Chapter 1. IntroductionFigure 1. TheRaspberry Pi ComputeModule 4 (CM4).The Raspberry Pi Compute Module 4 (CM4) is a System on Module (SoM) containing processor, memory, eMMC Flashand supporting power circuitry. These modules allow a designer to leverage the Raspberry Pi hardware and softwarestack in their own custom systems and form factors.

7 In addition these modules have extra IO interfaces over and abovewhat is available on the Raspberry Pi boards, opening up more options for the design of the CM4 is loosely based on the Raspberry Pi 4, Model B, and for cost sensitive applications it can besupplied without the eMMC fitted; this version is called the Raspberry Pi Compute Module 4 Lite (CM4 Lite).While previous generations of the Compute Module have all shared the same DDR2-SODIMM-mechanically-compatibleform factor, the new CM4 and CM4 Lite are different. The electrical interface of the CM4 is via two 100-pin high densityconnectors, and the new physical form factor has a smaller footprint overall when the connectors are taken into change is due to the addition of new interfaces; an additional second HDMI, PCIe, and Ethernet.

8 The addition of thesenew interfaces, especially PCIe, would not have been possible while preserving the previous form factor. NOTEU nless otherwise stated, for this document CM4 also refers to FeaturesKey features of the CM4 are as follows: Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ Small Footprint 55mm 40mm Module 4 mounting holes (HEVC) (upto 4Kp60 decode), (upto 1080p60 decode, 1080p30 encode) Raspberry Pi Compute Module Introduction3 OpenGL ES graphics Options for 1GB, 2GB, 4GB or 8GB LPDDR4-3200 SDRAM with ECC (see Appendix B) Options for 0GB (CM4 Lite), 8GB, 16GB, or 32GB eMMC Flash memory (see Appendix B) Peak eMMC bandwidth 100 MBytes/s (four times faster than previous Compute modules) Option (see Appendix B) for certified radio Module with.

9 GHz, GHz IEEE b/g/n/ac wireless Bluetooth , BLE On board electronic switch to select between PCB trace or external antenna Gigabit Ethernet PHY supporting IEEE 1588 1 PCIe 1-lane Host, Gen 2 ( 5 Gbps ) 1 USB port ( highspeed ) 28 GPIO supporting either or signalling and peripheral options: Up to 5 UART Up to 5 I2C Up to 5 SPI 1 SDIO interface 1 DPI (Parallel RGB Display) 1 PCM Up to 2 PWM channels Up to 3 GPCLK outputs 2 HDMI ports (up to 4Kp60 supported) MIPI DSI: 1 2-lane MIPI DSI display port 1 4-lane MIPI DSI display port MIPI CSI-2: 1 2-lane MIPI CSI camera port 1 4-lane MIPI CSI camera port 1 SDIO (CM4 Lite) Single +5v PSU Pi Compute Module Features4 Chapter 2.

10 WirelessThe CM4 can be supplied with an onboard wireless Module based on the Cypress CYW43455 supporting both, GHz, GHz IEEE b/g/n/ac wireless Bluetooth , wireless interfaces can be individually enabled or disabled as required. For instance, in the case of a kioskapplication, a service engineer could enable wireless operation and then disable it once CM4 has an onboard antenna . If used it should be positioned in the product such that it is not surrounded by metal,including any ground plane (see Chapter 3 for further details). Alternatively there is a standard connector on themodule, see Figure 1, so that an external antenna can be Pi has an antenna kit which is certified to be used with the CM4.